By @cereblab — Independent AI Safety Checker. Reproduce it yourself: github.com/cereblab/grok-build-exfil-repro

A measured, reproducible teardown. Findings are backed by captured artifacts (endpoint, HTTP method, status code, byte size, host) and repro commands; where an observation was seen live but not retained as a file, §7 says so explicitly. Section 8 is an evidence appendix with SHA-256s and a "what we did not prove" list. All captures are of my own traffic on my own machine, using a throwaway repository containing fake "canary" secrets — no real credentials were exposed.

A guide for creating a virtual display on an NVIDIA GPU (tested on RTX 5080, driver 595.58) with HDR, custom resolutions, and 4K@120Hz support for headless Sunshine/Moonlight streaming on Linux.

Works on both HDMI and DisplayPort connectors with no physical display or dummy plug connected.

Running Sunshine headless on Linux with NVIDIA is painful:

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

• https://leetcode.com/problems/maximum-subarray/ # Close enough
• https://leetcode.com/problems/minimum-size-subarray-sum/

1. Web Wormhole https://webwormhole.io/ https://github.com/saljam/webwormhole
2. Localsend https://web.localsend.org/
3. FilePizza https://file.pizza/
4. ShareDrop sharedrop.io https://github.com/szimek/sharedrop (SOLD, not recommended, use one of the forks)
   1. A clone SnapDrop snapdrop.net https://github.com/RobinLinus/snapdrop (SOLD, not recommended, use one of the forks)
      1. A fork PairDrop https://pairdrop.net/ https://github.com/schlagmichdoch/pairdrop
5. ToffeeShare https://toffeeshare.com/
6. Instant.io https://instant.io/

This downloads standalone MSVC compiler, linker & other tools, also headers/libraries from Windows SDK into portable folder, without installing Visual Studio. Has bare minimum components - no UWP/Store/WindowsRT stuff, just files & tools for native desktop app development.

Run py.exe portable-msvc.py and it will download output into msvc folder. By default it will download latest available MSVC & Windows SDK from newest Visual Studio.

You can list available versions with py.exe portable-msvc.py --show-versions and then pass versions you want with --msvc-version and --sdk-version arguments.

To use cl.exe/link.exe first run setup_TARGET.bat - after that PATH/INCLUDE/LIB env variables will be updated to use all the tools as usual. You can also use clang-cl.exe with these includes & libraries.

To use clang-cl.exe without running setup.bat, pass extra /winsysroot msvc argument (msvc is folder name where output is stored).